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    				| 1. | Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is `1s^(2),2s^(2)2p^(3)`, the simplest formula for this compound isA. `Mg_(2)X`B. `MgX_(2)`C. `Mg_(2)X_(3)`D. `Mg_(3)X_(2)` | 
| Answer» Correct Answer - D Given, electronic configuration of `X=1s^(2)2s^(2)2p^(3)` `therefore` The valency of X will be 3. The valency of Mg is +2 `therefore` Magnesium reacts with element X to form an ionic compound with formula `Mg_(3)X_(2)`. | |